CN113047863A - Mechanized underground excavation assembly type subway station and construction method thereof - Google Patents
Mechanized underground excavation assembly type subway station and construction method thereof Download PDFInfo
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- CN113047863A CN113047863A CN202110367293.7A CN202110367293A CN113047863A CN 113047863 A CN113047863 A CN 113047863A CN 202110367293 A CN202110367293 A CN 202110367293A CN 113047863 A CN113047863 A CN 113047863A
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- 238000010276 construction Methods 0.000 title claims abstract description 46
- 238000009412 basement excavation Methods 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 claims abstract description 17
- 229910000831 Steel Inorganic materials 0.000 claims description 14
- 239000010959 steel Substances 0.000 claims description 14
- 238000005452 bending Methods 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 239000002689 soil Substances 0.000 claims description 3
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims 7
- 235000017491 Bambusa tulda Nutrition 0.000 claims 7
- 241001330002 Bambuseae Species 0.000 claims 7
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims 7
- 239000011425 bamboo Substances 0.000 claims 7
- 238000009415 formwork Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/14—Layout of tunnels or galleries; Constructional features of tunnels or galleries, not otherwise provided for, e.g. portals, day-light attenuation at tunnel openings
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/08—Lining with building materials with preformed concrete slabs
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D13/00—Large underground chambers; Methods or apparatus for making them
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Civil Engineering (AREA)
- Lining And Supports For Tunnels (AREA)
- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
Abstract
The invention discloses a mechanized underground excavation assembly type subway station and a construction method thereof, and relates to the technical field of underground structures and construction. The invention adopts a pipe jacking method to carry out subway station construction, is a mechanized underground excavation method, occupies a small construction field on the ground, can avoid or greatly reduce traffic guidance change and pipeline change, can effectively reduce the influence of subway station construction on the surrounding urban environment, resident life and trip, and is particularly suitable for urban busy areas. The invention adopts an assembly type subway station structure, can reduce the field workload and the construction complexity, and improves the construction efficiency and the engineering quality. The method can improve the sustainability of subway construction and has great social and economic benefits.
Description
Technical Field
The invention relates to the technical field of underground structures and construction, in particular to a mechanized underground excavation assembly type subway station and a construction method thereof.
Background
In order to solve the problems of population gathering, traffic congestion and the like caused by deepening of the urbanization degree, underground rail traffic construction is continuously promoted in various places of China. Subway stations are important components of underground rail transit systems. When a subway station is built, open excavation is mostly adopted at present, namely, foundation pit excavation is firstly carried out, and then a main structure of the station is built by supporting a formwork from bottom to top. The open cut method is mature in construction technology and easy to implement, but needs to occupy a large number of construction sites, often needs to carry out traffic guidance and pipeline relocation, has great influence on the surrounding urban environment, resident life and travel, increases the cost of cost, and has insignificant social and economic benefits. On the other hand, when the open cut method is used for construction, the main structure of the subway station is generally constructed by on-site formwork erecting and cast-in-place, and the problems of large on-site workload, complex construction, low construction efficiency and the like exist.
Disclosure of Invention
The invention aims to provide a mechanized underground excavation assembly type subway station and a construction method thereof, which are used for solving the problems in the prior art, reducing the field workload and the construction complexity and improving the construction efficiency and the engineering quality.
In order to achieve the purpose, the invention provides the following scheme:
the invention provides a mechanized underground excavation assembly type subway station which comprises a plurality of external structures, wherein the adjacent external structures are longitudinally arranged and mutually connected, an internal structure is arranged inside the external structures, and the external structures and the internal structure are both assembly type structures.
Preferably, the external structure comprises a top plate structure and a bottom plate structure, the top plate structure and the bottom plate structure are arranged oppositely, one end of the top plate structure is connected with one end of the bottom plate structure, and the other end of the top plate structure is connected with the other end of the bottom plate structure through a middle pipe piece.
Preferably, the top plate structure comprises two top plate segments, the bottom plate structure comprises two bottom plate segments, and the two top plate segments, the middle segment, the two bottom plate segments and the other middle segment are sequentially connected to form the external structure; two between the roof section of jurisdiction, two all connect through first articulate between the bottom plate section of jurisdiction, the roof section of jurisdiction with between the middle section of jurisdiction the bottom plate section of jurisdiction with all connect through the second between the middle section of jurisdiction, the second connects the setting and is in the position that exterior structure bending moment connects for zero.
Preferably, the first joint comprises a sliding block and a sliding groove which are matched with each other, the sliding block is arranged on one of the top plate pipe piece and the bottom plate pipe piece, and the sliding groove is arranged on the other of the top plate pipe piece and the bottom plate pipe piece.
Preferably, the second connects including tongue-and-groove and the tenon tooth that matches each other, the tongue-and-groove sets up on the middle section of jurisdiction, the tenon tooth sets up the roof section of jurisdiction with on the bottom plate section of jurisdiction, one side that the second connects is through first prestressing force bolted connection, the opposite side that the second connects is provided with pre-buried steel sheet, the outside of pre-buried steel sheet is provided with the grid steel sheet, the roof section of jurisdiction with between the middle section of jurisdiction the bottom plate section of jurisdiction with all be provided with stagnant water rubber between the middle section of jurisdiction.
Preferably, the internal structure comprises a middle plate, the middle plate is arranged in the middle of the external structure, an air channel is arranged on the middle plate, a plurality of frame columns are arranged between the top of the external structure and the middle plate and between the middle plate and the bottom of the external structure, frame beams are arranged between the frame columns and the middle plate and between the frame columns and the external structure, and a standing platform plate is arranged at the bottom of the external structure.
Preferably, the adjacent external structures are connected through second prestressed bolts, a groove is formed in each external structure, a screw rod of each second prestressed bolt penetrates through the adjacent external structure, two ends of the screw rod are located in the grooves, and two ends of the screw rod are in threaded connection with nuts.
The invention also provides a construction method of the mechanized underground excavation assembly type subway station, which comprises the following steps:
prefabricating a bottom plate duct piece, a top plate duct piece, a middle duct piece, a frame beam, a frame column, a middle plate, a platform plate and an air channel in a factory;
step two, connecting two top plate pipe pieces and two bottom plate pipe pieces through first joints, connecting the top plate pipe pieces with the middle pipe pieces and connecting the bottom plate pipe pieces with the middle pipe pieces through second joints, and arranging temporary pipe pieces and temporary supports to form complete pipe pieces;
thirdly, jacking the complete segments in the soil body section by using a pipe jacking method, and building an external structure of the subway station;
and step four, installing a frame beam and a frame column inside the subway station, removing the temporary duct piece and the temporary support, and installing a middle plate, a platform plate and an air channel.
Preferably, in the second step, the temporary segment is arranged at the midspan position of the top plate structure and the bottom plate structure of the external structure, and the temporary segment is connected with the external structure by adopting a third joint; the temporary support is disposed at the 1/2 level of the intermediate tube sheet of the outer structure.
Preferably, the third joint includes two fixed shells, two fixed shell cover is established two on the roof section of jurisdiction or two on the bottom plate section of jurisdiction, a plurality of sleeves set up on the fixed shell and stretch into the roof section of jurisdiction or in the bottom plate section of jurisdiction, the bolt passes in proper order interim section of jurisdiction the fixed shell stretches into in the sleeve.
Compared with the prior art, the invention has the following technical effects:
the invention adopts a pipe jacking method to carry out subway station construction, is a mechanized underground excavation method, occupies a small construction field on the ground, can avoid or greatly reduce traffic guidance change and pipeline change, can effectively reduce the influence of subway station construction on the surrounding urban environment, resident life and trip, and is particularly suitable for urban busy areas. The invention adopts an assembly type subway station structure, can reduce the field workload and the construction complexity, and improves the construction efficiency and the engineering quality. The method can improve the sustainability of subway construction and has great social and economic benefits.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic structural view of a mechanized underground excavation assembly type subway station of the present invention;
FIG. 2 is a schematic view of the external structure of the present invention;
FIG. 3 is a schematic view of a first joint of the present invention;
FIG. 4 is a schematic view of a second joint of the present invention;
FIG. 5 is a schematic view of a second prestressed bolt according to the present invention;
FIG. 6 is a schematic view of a second prestressed bolt installation according to the present invention;
FIG. 7 is a cross-sectional view of a full segment of the present invention;
FIG. 8 is a schematic view of a third joint of the present invention;
wherein: 100-mechanized underground excavation assembly type subway stations; 101-outer structure, 102-frame beam; 103-frame posts; 104-middle plate; 105-a station deck; 106-air duct; 107-top plate configuration; 108-a backplane structure; 109-internal structure; 201-a floor duct piece; 202-a roof sheet; 203-a middle tube sheet; 204-a second joint; 205-a first joint; 301-tenon teeth; 302-tongue and groove; 303-embedding a steel plate; 304-a first pre-stressed bolt; 305-water stop rubber; 306-a grid steel plate; 402-a slider; 403-a chute; 501-temporary segment; 502-temporary support; 503-a full segment; 504-a third linker; 601-a stationary shell; 602-a sleeve; 603-bolts; 702-a second pre-stressed bolt; 703-grooves; 7021-screw; 7022-nut.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.
The invention aims to provide a mechanized underground excavation assembly type subway station and a construction method thereof, which are used for solving the problems in the prior art, reducing the field workload and the construction complexity and improving the construction efficiency and the engineering quality.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Example one
As shown in fig. 1-6: the embodiment provides a mechanized subsurface excavation assembled subway station 100, which comprises a plurality of external structures 101, wherein the adjacent external structures 101 are longitudinally connected, an internal structure 109 is arranged inside the external structure 101, and the external structure 101 and the internal structure 109 are assembled structures. The longitudinal direction is the direction perpendicular to the paper surface in fig. 1.
Specifically, in this embodiment, the outer structure 101 includes a top plate structure 107 and a bottom plate structure 108, the top plate structure 107 and the bottom plate structure 108 are disposed opposite to each other, and one end of the top plate structure 107 and one end of the bottom plate structure 108, and the other end of the top plate structure 107 and the other end of the bottom plate structure 108 are connected through an intermediate duct piece 203.
In this embodiment, the top plate structure 107 includes two top plate segments 202, the bottom plate structure 108 includes two bottom plate segments 201, and the two top plate segments 202, one middle segment 203, the two bottom plate segments 201, and the other middle segment 203 are sequentially connected to form the outer structure 101; between two roof segments 202, all connect through first joint 205 between two bottom plate segments 201, between roof segment 202 and middle segment 203, all connect through second joint 204 between bottom plate segment 201 and the middle segment 203, and second joint 204 sets up the position that external structure 101 bending moment is close to zero or bending moment is zero.
In this embodiment, the first joint 205 includes a sliding block 402 and a sliding groove 403 which are matched with each other, the sliding block 402 and the sliding groove 403 are both made of steel, the sliding block 402 is disposed on one top plate segment 202 and one bottom plate segment 201, and the sliding groove 403 is disposed on the other top plate segment 202 and the other bottom plate segment 201. Fixed shells 601 are arranged between the sliding block 402 and the top plate segment 202 or the bottom plate segment 201, and between the sliding groove 403 and the top plate segment 202 or the bottom plate segment 201.
In this embodiment, the second connects 204 including tongue-and-groove 302 and the tenon tooth 301 that match each other, tongue-and-groove 302 and tenon tooth 301 all adopt the concrete to make, tongue-and-groove 302 sets up on middle section of jurisdiction 203, tenon tooth 301 sets up on roof section of jurisdiction 202 and bottom plate section of jurisdiction 201, one side that the second connects 204 is connected through first prestressing force bolt 304, first prestressing force bolt 304 is the bending form, the opposite side that the second connects 204 is provided with pre-buried steel sheet 303, the outside welding of pre-buried steel sheet 303 has grid steel sheet 306, between roof section of jurisdiction 202 and the middle section of jurisdiction 203, all be provided with stagnant water rubber 305 between bottom plate section of jurisdiction 201 and the middle section of jurisdiction 203.
In this embodiment, the internal structure 109 includes a middle plate 104, the middle plate 104 is disposed in the middle of the external structure 101, an air duct 106 is disposed on the middle plate 104, a plurality of frame columns 103 are disposed between the top of the external structure 101 and the middle plate 104 and between the middle plate 104 and the bottom of the external structure 101, frame beams 102 are disposed between the frame columns 103 and the middle plate 104 and between the frame columns 103 and the external structure 101, and a standing plate 105 is further disposed at the bottom of the external structure 101. Specifically, a frame beam 102 is provided between the upper end of the frame column 103 above the middle plate 104 and the top plate segment 202, and frame beams 102 are provided at both ends of the frame column 103 below the middle plate 104.
In this embodiment, the adjacent external structures 101 are connected by the second prestressed bolts 702, a groove 703 is provided in each external structure 101, the groove 703 is stepped, a screw 7021 of the second prestressed bolt 702 is inserted into the adjacent external structure 101, the screw 7021 is a straight screw, two ends of the screw 7021 are located in the groove 703, and two ends of the screw 7021 are in threaded connection with nuts 7022. During construction, two ends of the screw 7021 extend into the adjacent external structures 101 respectively, two ends of the screw 7021 are located in the grooves 703 of the adjacent external structures 101 respectively, and the screw 7021 and the external structures 101 are fixed by nuts 7022.
The embodiment adopts an assembly type subway station structure, so that the field workload and the construction complexity can be reduced, and the construction efficiency and the engineering quality are improved. The embodiment can improve the sustainability of subway construction and has great social and economic benefits.
Example two
As shown in fig. 7 to 8, the present embodiment provides a construction method of a mechanized underground excavation assembly type subway station 100 of the first embodiment, including the following steps:
prefabricating a bottom plate duct piece 201, a top plate duct piece 202, a middle duct piece 203, a frame beam 102, a frame column 103, a middle plate 104, a platform plate 105 and a wind tunnel 106 in a factory;
step two, connecting two top plate pipe pieces 202 and two bottom plate pipe pieces 201 through a first joint 205, connecting the top plate pipe pieces 202 with a middle pipe piece 203 and connecting the bottom plate pipe pieces 201 with the middle pipe piece 203 through a second joint 204, arranging a temporary pipe piece 501 and a temporary support 502, wherein the temporary pipe piece 501 and the temporary support 502 are both steel structures, and the temporary pipe piece 501 and the temporary support 502 are vertically arranged to form a complete pipe piece 503;
thirdly, jacking the complete segments 503 in the soil body section by using a pipe jacking method, wherein the pipe jacking method adopts large-section pipe jacking for construction, and an external structure 101 of the subway station is built;
and step four, installing the frame beam 102 and the frame column 103 in the subway station, removing the temporary duct piece 501 and the temporary support 502, and installing the middle plate 104, the platform plate 105 and the air duct 106.
In this embodiment, in the second step, the temporary segment 501 is disposed at the midspan position of the top plate structure 107 and the bottom plate structure 108 of the external structure 101, and the temporary segment 501 is connected to the external structure 101 by using the third joint 504; the temporary supports 502 are disposed at the 1/2 level of the middle tube sheet 203 of the outer structure 101.
In this embodiment, the third joint 504 includes two fixed shells 601, two fixed shells 601 are sleeved on two top plate segments 202 or two bottom plate segments 201, a plurality of sleeves 602 are arranged on the fixed shells 601 and extend into the top plate segments 202 or the bottom plate segments 201, and the bolts 603 sequentially pass through the temporary segments 501, the fixed shells 601 and extend into the sleeves 602. The stationary housing 601, the sleeve 602 and the bolt 603 are all made of steel.
The pipe jacking method is adopted for subway station construction, the mechanical underground excavation construction method is adopted, the construction site occupied on the ground is small, traffic guidance and pipeline relocation can be avoided or greatly reduced, therefore, the influence of subway station construction on urban environment, resident life and travel can be effectively reduced, and the method is particularly suitable for urban busy areas.
EXAMPLE III
The difference between this embodiment and the second embodiment is: in the third step, the pipe jacking method adopts combined pipe jacking to carry out construction. The combined pipe jacking machine comprises an upper small-section pipe jacking machine and a lower small-section pipe jacking machine which are combined up and down, and during construction, one of the left line and the right line is firstly constructed, and then the other line is constructed.
The principle and the implementation mode of the present invention are explained by applying specific examples in the present specification, and the above descriptions of the examples are only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (10)
1. The utility model provides a mechanized subsurface excavation assembled subway station which characterized in that: including a plurality of exterior structure, it is adjacent exterior structure is along vertical setting and interconnect, the inside inner structure that is provided with of exterior structure, the exterior structure with the inner structure is the assembled structure.
2. The mechanized underground excavation assembled subway station of claim 1, wherein: the outer structure comprises a top plate structure and a bottom plate structure, the top plate structure and the bottom plate structure are arranged oppositely, one end of the top plate structure is connected with one end of the bottom plate structure, and the other end of the top plate structure is connected with the other end of the bottom plate structure through a middle duct piece.
3. The mechanized underground excavation assembled subway station of claim 2, wherein: the top plate structure comprises two top plate pipe pieces, the bottom plate structure comprises two bottom plate pipe pieces, and the two top plate pipe pieces, the middle pipe piece, the two bottom plate pipe pieces and the other middle pipe piece are sequentially connected to form the external structure; two between the roof section of jurisdiction, two all connect through first articulate between the bottom plate section of jurisdiction, the roof section of jurisdiction with between the middle section of jurisdiction the bottom plate section of jurisdiction with all connect through the second between the middle section of jurisdiction, the second connects the setting and is in the position that exterior structure bending moment connects for zero.
4. The mechanized underground excavation assembled subway station of claim 3, wherein: the first joint comprises a sliding block and a sliding groove which are matched with each other, the sliding block is arranged on one of the top plate pipe piece and the bottom plate pipe piece, and the sliding groove is arranged on the other of the top plate pipe piece and the bottom plate pipe piece.
5. The mechanized underground excavation assembled subway station of claim 3, wherein: the second connects including tongue-and-groove and the tenon tooth that matches each other, the tongue-and-groove sets up on the middle section of thick bamboo piece, the tenon tooth sets up the roof section of thick bamboo piece with on the bottom plate section of thick bamboo piece, one side that the second connects is through first prestressing force bolted connection, the opposite side that the second connects is provided with pre-buried steel sheet, the outside of pre-buried steel sheet is provided with the grid steel sheet, the roof section of thick bamboo piece with between the middle section of thick bamboo piece the bottom plate section of thick bamboo piece with all be provided with stagnant water rubber between the middle section of thick bamboo piece.
6. The mechanized underground excavation assembled subway station of claim 1, wherein: the internal structure comprises a middle plate, the middle plate is arranged in the middle of the external structure, an air channel is arranged on the middle plate, a plurality of frame columns are arranged between the top of the external structure and the middle plate and between the middle plate and the bottom of the external structure, frame beams are arranged between the frame columns and the middle plate and between the frame columns and the external structure, and a station platform plate is arranged at the bottom of the external structure.
7. The mechanized underground excavation assembled subway station of claim 1, wherein: the adjacent external structures are connected through second prestressed bolts, grooves are formed in the external structures, screw rods of the second prestressed bolts penetrate through the adjacent external structures, two ends of each screw rod are located in the grooves, and nuts are connected to two ends of each screw rod in a threaded mode.
8. A construction method of a mechanized underground excavation assembled subway station as claimed in any one of claims 1 to 7, characterized in that: the method comprises the following steps:
prefabricating a bottom plate duct piece, a top plate duct piece, a middle duct piece, a frame beam, a frame column, a middle plate, a platform plate and an air channel in a factory;
step two, connecting two top plate pipe pieces and two bottom plate pipe pieces through first joints, connecting the top plate pipe pieces with the middle pipe pieces and connecting the bottom plate pipe pieces with the middle pipe pieces through second joints, and arranging temporary pipe pieces and temporary supports to form complete pipe pieces;
thirdly, jacking the complete segments in the soil body section by using a pipe jacking method, and building an external structure of the subway station;
and step four, installing a frame beam and a frame column inside the subway station, removing the temporary duct piece and the temporary support, and installing a middle plate, a platform plate and an air channel.
9. The construction method of a mechanized underground excavation assembled subway station as claimed in claim 8, wherein: in the second step, the temporary duct piece is arranged at the midspan position of the top plate structure and the bottom plate structure of the external structure, and the temporary duct piece is connected with the external structure by adopting a third joint; the temporary support is disposed at the 1/2 level of the intermediate tube sheet of the outer structure.
10. The construction method of a mechanized underground excavation assembled subway station as claimed in claim 9, wherein: the third joint comprises two fixed shells, wherein the two fixed shells are sleeved on the two top plate pipe pieces or the two bottom plate pipe pieces, a plurality of sleeves are arranged on the fixed shells and stretch into the top plate pipe pieces or the bottom plate pipe pieces, and bolts sequentially penetrate through the temporary pipe pieces and the fixed shells and stretch into the sleeves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110367293.7A CN113047863A (en) | 2021-04-06 | 2021-04-06 | Mechanized underground excavation assembly type subway station and construction method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110367293.7A CN113047863A (en) | 2021-04-06 | 2021-04-06 | Mechanized underground excavation assembly type subway station and construction method thereof |
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| CN113047863A true CN113047863A (en) | 2021-06-29 |
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| CN202110367293.7A Pending CN113047863A (en) | 2021-04-06 | 2021-04-06 | Mechanized underground excavation assembly type subway station and construction method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114352326A (en) * | 2022-01-24 | 2022-04-15 | 中铁工程装备集团有限公司 | Assembled subway station and construction method thereof |
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| JPH08253946A (en) * | 1995-03-17 | 1996-10-01 | Fujita Corp | Reverse placing method for concrete of underground structure under road |
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| CN114352326A (en) * | 2022-01-24 | 2022-04-15 | 中铁工程装备集团有限公司 | Assembled subway station and construction method thereof |
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